Add TPC-E support

[bpkroth]

Would be nice to add TPC-E as a supported benchmark as well.

[apavlo]

I totally agree with you. We have an incomplete implementation in Java for H-Store but it is over 10 years old:

https://github.com/apavlo/h-store/tree/master/src/benchmarks/edu/brown/benchmark/tpce/

Nothing comes up on Google for another Java implementation.

[bryanosborne]

I second this request!

[apavlo]

WIP TPC-E Branch from @xinhao_dev: https://github.com/xinhaoc/benchbase/tree/xinhao_dev